干涉型光纤水听器零差解调虚拟仪器实现  

Homodyne Demodulation scheme for Interferometric Fiber-Optic Hydrophone by Virtual Instrument

作　　者：刘尔[1] 周力[1] 

机构地区：[1]南昌航空大学电子信息工程学院,江西南昌330063

出　　处：《微计算机信息》2009年第13期139-141,共3页Control & Automation

基　　金：基金申请人:周力;江西省自然科学基金资助项目:镀膜光纤声光相互作用机理及光纤微结构演变规律的研究;颁发部门:江西省科技厅(2007GZW1582)

摘　　要：对以Mach-Zehnder干涉仪为基础的光纤水听器零差解调技术进行研究。在干涉信号的输出端做了改进,采用了差动接收的方式,提出了基于虚拟仪器(以下简称VI)的软件解调方法,结合物理模型在LabVIEW平台下开发出零差解调的VI软件。对不同噪声环境下的单频信号和多频信号进行仿真测试,解调结果与原信号进行幅值对比和互相关分析,信号幅度衰减小于10%,相关系数达95%以上,基本保持了原信号的特征.表明干涉型光纤水听器零差解调VI软件具有较高的可靠性。A homodyne demodulation scheme for fiber-optic al hydrophone based on The M-Z interferometer was investigated in this paper. An improvement has been employed in the M-Z interferometer＇s out-put, has adopted the differential motion receive method, proposed the software demodulates method which is establishment on virtual instrument （to hereafter refer to as VI） , union physical model under the LabVIEW platform develops the VI software of homodyne demodulation . Carries on demodulation simulation under this VI platform to monofrequent signal and multi-frequency signal both which Under different noise environment, then carries on scope value contrast and the correlation analysis between the result signal and the original signal, the scope weaken is smaller than 10%, the correlation coefficient reaches above 95%, doesn＇t affect to the original signal characteristic study. It indicated that the VI software demodulation method of homodyne detection has good reliability

关 键 词：干涉型光纤水听器 零差解调 仿真测试 虚拟仪器 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置] TP319[自动化与计算机技术—控制科学与工程]